215138602489 has 8 divisors (see below), whose sum is σ = 224368030208. Its totient is φ = 206052266880.

The previous prime is 215138602457. The next prime is 215138602493. The reversal of 215138602489 is 984206831512.

215138602489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 215138602489 - 2⁵ = 215138602457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215138602409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35769957 + ... + 35775970.

It is an arithmetic number, because the mean of its divisors is an integer number (28046003776).

Almost surely, 2^215138602489 is an apocalyptic number.

It is an amenable number.

215138602489 is a deficient number, since it is larger than the sum of its proper divisors (9229427719).

215138602489 is an equidigital number, since it uses as much as digits as its factorization.

215138602489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71546055.

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 215138602489 in words is "two hundred fifteen billion, one hundred thirty-eight million, six hundred two thousand, four hundred eighty-nine".